US 12,230,984 B2
Battery abnormality detection device, battery abnormality detection method, and recording medium recorded with battery abnormality detection program
Kosuke Nishioka, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Mar. 22, 2022, as Appl. No. 17/700,697.
Claims priority of application No. 2021-081816 (JP), filed on May 13, 2021.
Prior Publication US 2022/0368138 A1, Nov. 17, 2022
Int. Cl. H01M 10/42 (2006.01); H02J 7/00 (2006.01)
CPC H02J 7/0019 (2013.01) [H01M 10/4257 (2013.01); H02J 7/0048 (2020.01); H02J 7/007182 (2020.01); H01M 2010/4271 (2013.01); H01M 2220/20 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A battery abnormality detection device comprising:
a memory; and
a processor coupled to the memory,
the processor being configured to:
for an equalization circuit including a discharge circuit provided with a switch that, in a case of being switched ON, causes a battery cell to discharge, and including a detector connected to the battery cell in parallel to the discharge circuit so as to detect a voltage of the battery cell,
acquire a first voltage in a case in which the switch has been switched OFF and a second voltage in a case in which the switch has been switched ON, as detected by the detector, and
estimate, from a detected value of one of the acquired first voltage or second voltage, an estimated value of another of the acquired first voltage or second voltage, and determine whether or not an abnormality has occurred in the equalization circuit based on the detected value and the estimated value.